I have windows 7 x64 ultimate. I downloaded .NET framework v4.03 and installed it however when I try to run certain programs I keep getting the error message that I haven't installed it yet. I've downloaded the .NET framework verification tool and after using it to verify v4.0 it says that the verifcation has failed.
At this point I'm not sure what to do.
If verification failed, you need to remove .NET Framework 4.0 and reinstall it.
To maximize the probability of success, I suggest the following procedure:
Remove .NET Framework 4.0 using Add/Remove...
Use this utility to identify and remove any .NET Framework 4.0 parts that may remain:
Reinstall as follows:
1. Download a fresh copy of the standalone installer for .NET Framework 4.0 Client Profile:
2. Before running the installer, apply irarab's fix as follows:
"I went to "C:\Windows\Microsoft.NET" there is a directory called "assembly".
I looked in the directory and found some subdirectories with lots of old dot net 4 files. I renamed the directory assembly2 and tried to install Dot Net 4 and it worked!!!!
(You can't delete the assembly directory unless you take ownership of it but you can rename it.)"
Also, clear your %temp% directory and disable your AV software.
The %temp% directory is a reference to the Temp folder associated with the current user. To clear it, do the following:
Sign on to your system with the Administrator user account you will use to run the installer. Click the Start Orb and type %temp% in the search box. The search results will show the Temp folder you want. Click on the Temp folder to open it in Windows Explorer, then delete the entire contents.
3. Run the standalone installer from step 1 As Administrator.
If the install fails, provide complete install logs as follows:
Collect your full install logs as follows:
Please collect your install logs with this:
After you run Collect.exe, you'll find vslogs.cab in your %temp% directory. Please upload vslogs.cab to a public site, like SkyDrive, and post the link here.
- Marked as answer by Barry WangMicrosoft contingent staff, Moderator Friday, February 17, 2012 9:25 AM