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I'm using Nitro Pro ver. 13.49.2.993 . When Nitro Pro is set as default app for PDF documents whole Windows desktop including the application taskbar is freezing and like refreshing every 60-90 sec. When it's happening the MS File Explorer is closing down and have to be reopened from scratch. Also when typing a text in Outlook message the kayboard is like hanging and off use for some 5-10 sec. When set Acrobat Reader DC is set as the default app for PFD files all works correctly. Felikss

Andy, have you checked to see if Outlook has disabled the add-in? This has happened with several of our users, and Outlook flat-out refuses to stop disabling the add-in. Nitro's solution is a very subpar "edit the registry" fix that is light on details. I'm sorry to see your complaint has fallen on deaf ears: that means the chance of a rapid solution to my problem isn't near.

Dear @REBECCA LANTZ, Thank you for your comments! The description of the problem is absolutely correct about everything - all those flashings and reloading of taskbar, file explorer windows closes etc.etc.. All above comments are also the same with me. You are right, @AllainU didn't understand the issue we have . I have no problems to set Nitro Pro PDF as my Default PDF app, just when I do that all those problems starts again! Still expect to get some support from Nitro! regards, Felikss

I just reran the uninstall clean-up to see what might happen if I reinstalled latest version again and this is what command prompt window states: Microsoft (R) Windows Script Host Version 5.812 Copyright (C) Microsoft Corporation. All rights reserved. 0 [ 10/7/2021 12:28:16 PM ] - [Full Cleanup] [ 10/7/2021 12:28:16 PM ] - [Uninstall Nitro products] [ 10/7/2021 12:28:16 PM ] - [Uninstall] - Nitro PDF Professional 7 [ 10/7/2021 12:28:16 PM ] - [Uninstall] - Nitro PDF Professional [ 10/7/2021 12:28:16 PM ] - [Uninstall] - Nitro Pro 8 [ 10/7/2021 12:28:16 PM ] - [Uninstall] - Nitro Pro 9 [ 10/7/2021 12:28:16 PM ] - [Uninstall] - Nitro Pro 10 [ 10/7/2021 12:28:16 PM ] - [Uninstall] - Nitro Pro [ 10/7/2021 12:28:16 PM ] - [Uninstall] - Nitro Reader 3 [ 10/7/2021 12:28:16 PM ] - [Uninstall] - Nitro Reader 4 [ 10/7/2021 12:28:16 PM ] - [Uninstall] - Nitro PDF Reader [ 10/7/2021 12:28:16 PM ] - [Uninstall] - Nitro PDF Reader 2 [ 10/7/2021 12:28:16 PM ] - [Uninstall] - Nitro Reader [ 10/7/2021 12:28:16 PM ] - [Uninstall] - Nitro PDF DMS [ 10/7/2021 12:28:16 PM ] - [Uninstall] - Nitro DMS [ 10/7/2021 12:28:16 PM ] - [Uninstall] - Nitro PDF Express [ 10/7/2021 12:28:16 PM ] - [Uninstall] - Nitro PDF Express [ 10/7/2021 12:28:16 PM ] - [Uninstall] - Nitro OCR Expansion [ 10/7/2021 12:28:16 PM ] - [Uninstall Nitro Printers] [ 10/7/2021 12:28:16 PM ] - [Uninstall printers by OS] [ 10/7/2021 12:28:16 PM ] - [Delete all printers files ] [ 10/7/2021 12:28:16 PM ] - [Try to stop spooler] [ 10/7/2021 12:28:16 PM ] - [Wait 5 seconds] [ 10/7/2021 12:28:21 PM ] - [Printer files remove] [ 10/7/2021 12:28:21 PM ] - [Try to start spooler] [ 10/7/2021 12:28:21 PM ] - [Disc Cleanup] [ 10/7/2021 12:28:21 PM ] - [Remove folder(s)] - C:\Users\Rebecca\AppData\Local\Temp\Nitro* [ 10/7/2021 12:28:21 PM ] - [Remove file(s)] - C:\Users\Rebecca\AppData\Local\Temp\Nitro* [ 10/7/2021 12:28:21 PM ] - [Remove Registry Keys] [ 10/7/2021 12:28:21 PM ] - > Error: Can not remove registry by VBS. Error occured. HKCR\AppID\{3A7B4EA1-8CA8-4629-B09A-FB4EE0632BA8} [ 10/7/2021 12:28:21 PM ] - Try to delete key with using cmd commands [ 10/7/2021 12:28:21 PM ] - > Error: Can not remove registry by VBS. Error occured. HKCR\AppID\NPNitroIE.dll [ 10/7/2021 12:28:21 PM ] - Try to delete key with using cmd commands [ 10/7/2021 12:28:21 PM ] - > Error: Can not remove registry by VBS. Error occured. HKCR\TypeLib\{3422E9DB-7B00-4552-B016-6FBF93C5A2D8} [ 10/7/2021 12:28:21 PM ] - Try to delete key with using cmd commands [ 10/7/2021 12:28:21 PM ] - > Error: Can not remove registry by VBS. Error occured. HKCR\TypeLib\{73BA4610-4C33-4056-9141-9C3E3DF75428} [ 10/7/2021 12:28:21 PM ] - Try to delete key with using cmd commands [ 10/7/2021 12:28:21 PM ] - > Error: Can not remove registry by VBS. Error occured. HKCR\Wow6432Node\AppID\{3A7B4EA1-8CA8-4629-B09A-FB4EE0632BA8} [ 10/7/2021 12:28:21 PM ] - Try to delete key with using cmd commands [ 10/7/2021 12:28:21 PM ] - > Error: Can not remove registry by VBS. Error occured. HKCR\Wow6432Node\AppID\NPNitroIE.dll [ 10/7/2021 12:28:21 PM ] - Try to delete key with using cmd commands [ 10/7/2021 12:28:21 PM ] - > Error: Can not remove registry by VBS. Error occured. HKCR\Wow6432Node\TypeLib\{3422E9DB-7B00-4552-B016-6FBF93C5A2D8} [ 10/7/2021 12:28:21 PM ] - Try to delete key with using cmd commands [ 10/7/2021 12:28:21 PM ] - > Error: Can not remove registry by VBS. Error occured. HKCR\Wow6432Node\TypeLib\{73BA4610-4C33-4056-9141-9C3E3DF75428} [ 10/7/2021 12:28:21 PM ] - Try to delete key with using cmd commands [ 10/7/2021 12:28:21 PM ] - > Error: Can not remove registry by VBS. Error occured. HKCU\Software\Microsoft\Internet Explorer\InternetRegistry\REGISTRY\USER\S-1-5-21-135482287-46112240-147394707-1265\Software\Nitro [ 10/7/2021 12:28:21 PM ] - Try to delete key with using cmd commands [ 10/7/2021 12:28:21 PM ] - [Remove Registry Values] [ 10/7/2021 12:28:21 PM ] - > Error: Can not remove registry by VBS. Error occured. HKCU\Software\Microsoft\Office\{0}\Outlook\Addins\NitroPDFProfessional.MSOfficeAddin10 [ 10/7/2021 12:28:21 PM ] - Try to delete key with using cmd commands [ 10/7/2021 12:28:21 PM ] - > Error: Can not remove registry by VBS. Error occured. HKCU\Software\Microsoft\Office\{0}\Outlook\Addins\NitroPDFProfessional.MSOfficeAddin11} [ 10/7/2021 12:28:21 PM ] - Try to delete key with using cmd commands [ 10/7/2021 12:28:21 PM ] - > Error: Can not remove registry by VBS. Error occured. HKCU\Software\Microsoft\Office\{0}\Outlook\Addins\NitroPDFProfessional.MSOfficeAddin12 [ 10/7/2021 12:28:21 PM ] - Try to delete key with using cmd commands [ 10/7/2021 12:28:21 PM ] - > Error: Can not remove registry by VBS. Error occured. HKCU\Software\Microsoft\Office\{0}\Outlook\Addins\NitroPDFProfessional.MSOfficeAddin13 [ 10/7/2021 12:28:21 PM ] - Try to delete key with using cmd commands [ 10/7/2021 12:28:21 PM ] - > Error: Can not remove registry by VBS. Error occured. HKCU\Software\Microsoft\Office\{0}\Outlook\Addins\NitroPDFProfessional.MSOfficeAddin10 [ 10/7/2021 12:28:21 PM ] - Try to delete key with using cmd commands [ 10/7/2021 12:28:21 PM ] - > Error: Can not remove registry by VBS. Error occured. HKCU\Software\Microsoft\Office\{0}\Outlook\Addins\NitroPDFProfessional.MSOfficeAddin11} [ 10/7/2021 12:28:21 PM ] - Try to delete key with using cmd commands [ 10/7/2021 12:28:21 PM ] - > Error: Can not remove registry by VBS. Error occured. HKCU\Software\Microsoft\Office\{0}\Outlook\Addins\NitroPDFProfessional.MSOfficeAddin12 [ 10/7/2021 12:28:21 PM ] - Try to delete key with using cmd commands [ 10/7/2021 12:28:21 PM ] - > Error: Can not remove registry by VBS. Error occured. HKCU\Software\Microsoft\Office\{0}\Outlook\Addins\NitroPDFProfessional.MSOfficeAddin13 [ 10/7/2021 12:28:21 PM ] - Try to delete key with using cmd commands [ 10/7/2021 12:28:21 PM ] - > Error: Can not remove registry by VBS. Error occured. HKCU\Software\Microsoft\Office\{0}\Outlook\Addins\NitroPDFProfessional.MSOfficeAddin10 [ 10/7/2021 12:28:21 PM ] - Try to delete key with using cmd commands [ 10/7/2021 12:28:21 PM ] - > Error: Can not remove registry by VBS. Error occured. HKCU\Software\Microsoft\Office\{0}\Outlook\Addins\NitroPDFProfessional.MSOfficeAddin11} [ 10/7/2021 12:28:21 PM ] - Try to delete key with using cmd commands [ 10/7/2021 12:28:21 PM ] - > Error: Can not remove registry by VBS. Error occured. HKCU\Software\Microsoft\Office\{0}\Outlook\Addins\NitroPDFProfessional.MSOfficeAddin12 [ 10/7/2021 12:28:21 PM ] - Try to delete key with using cmd commands [ 10/7/2021 12:28:21 PM ] - > Error: Can not remove registry by VBS. Error occured. HKCU\Software\Microsoft\Office\{0}\Outlook\Addins\NitroPDFProfessional.MSOfficeAddin13 [ 10/7/2021 12:28:21 PM ] - Try to delete key with using cmd commands Cleanup finished. Press [ENTER] to exit...

Nitro Pro 13 version 13.49.2.993 latest update in September 10 Allain- I don't think what OP is getting at is changing the default pdf program is his problem. He means, it is Nitro causing problems when it IS the default pdf app! - I have now realized that, after the update, I had had a similar issue as OP with my desktop icons and taskbar reloading and flashing, file explorer or other open windows I was working with would close when the flashes took place every 10-30 seconds. Also, MS Outlook 2019 was reporting that "Nitro add-in" was causing Outlook to load slow. I thought it could be my monitor, so switched monitors- problems still occurred. Then, thought it was my pc beginning to crash. A computer tech tried So I ordered a brand new Dell Optiplex 7090 i7-11700- workied with the new pC for a number of hours the day I received it and it worked great until after I installed Nitro 13.49.2.993-the problems began occurring on my brand new PC immediately after the Nitro Pro 13 was install and activated! So, I uninstalled and deleted all of the files and found on your forums to use the 'clean up' file. I did that and redownloaded again. The same problems began happening. At this point I have again uninstalled all Nitro and ran the clean-up. I have been trying to find and install the version immediately before the latest update of 13- it worked fine, but I cannot seem to find where you had all of the recent update files. I had to find a reversion previously for another matter. I have been a licensed purchaser of Nitro for many years and this has been extremely frustrating and expensive! My PC works great without Nitro installed! Can you have your team please look into these issues and release a new Nitro Pro13 update to repair this? I keep checking back. RL

Dear Leslie, I did all what you were asked for. But the issue is still exists in absolutely same way if Nitro Pro is set as default App. Felikss

This same thing is happening to me right now. It only happens when I only have 2 buttons in the same group. If I have 3 or more, it functions properly. I'm new to Nitro, so assumed I was doing something wrong, but I can't see that I am.

Just a heads up to @J Gorrell as well as anyone else having trouble with downloading the .msi files provided by @AllainU, please note that if you are using Chrome or any of the Chromium-based browsers (e.g., Vivaldi, etc.), you're more than likely experiencing the results of a new security feature that was silently pushed out to the browsers, which blocks .exe/.msi/etc downloads without any visible error or prompt on the browser's frontend user space. Here's how you would bypass the issue: Right-click the link you're trying to download, and select "Save link as..." Choose your save location and select "Save" On the bottom edge of your browser window, the Downloads bar should now appear and the file will show up with a red error icon, attempting to block the download. Press the caret button and select "Keep" And that should do the trick! Hope that helps. For anyone interested, this was where I first identified the issue was likely with Chromium.

The NitroSign pricing page (https://www.nitrosign.com/pricing ) shows that the Core plan is $84/year, but has no link to make a purchase. I have created a free/trial account, tested the product and would now like to purchase the NitroSign Core plan. How do I convert my trial account to a paid account of Nitro Sign? Thanks

For signers who do not have an email address, would be great if we could send an e-signature request link via SMS/text message and where the signer can get a copy of the signed pdf by SMS/text link.

Pls bring back the Evernote Plugin feature. This feature allows users with an Evernote account to directly send a PDF from Nitro Pro to Evernote. It is a major time saver and has been a major reason why corporate users have selected Nitro PDF as their primary PDF viewer and editor. All, pls upvote to get heard!

Hi, in times of corona-caused "homeschooling" as teacher I'm enthusiastic about the capabilities of Nitro. When working with my Android-tablet i am missing this feature. I would appreciate an Android version of Nitro. Jeffrey42

Hi, I'm trying to add the esign in multiple pages in the same pdf. Do I need to add the signature option per page or is there anyway to add it at once and it gets added it to every page? Thank you!