The error 1935 in Windows 7 is generated by Windows Installer when it is unable to access a particular file or folder while installing Microsoft Office, Visual Studio, or other .Net programs. The inaccessibility of a file or folder can occur due to several reasons. Check the steps given below and fix the error in your Windows 7 computer:
1. Before beginning with the mission 1935, simply create a restore point or back up your data to avoid data loss or other problems during the event. (See Also how to use system restore in Windows 7)
2. Download and run a registry cleaner program from a trusted website. Save the file to your desktop and install it using the wizard’s instructions. When done, open the file and run it. If prompted, create a restore point. Wait until the program automatically scans for corrupt, empty registry keys and removes them. (See Also how to fix registry errors in Windows 7)
3. Wait until procedure finishes. Do not shutdown the computer unless finished. You can choose to download a free or paid version from the available registry cleaner programs. These include PC Health Advisor, ReglnOut, FrontlineReg Cleaner, Registry Mechanic, RegClean, Registry Easy, and Advanced System Optimizer among others.
4. Since the error can also be caused by corrupt Mccoree.dll files in registry, run a scan from your registry cleaner to fix their problem. You can also remove and reinstall the program that uses Mccoree.dll file from its official website. (See Also Windows repair here)
5. If it is the Microsoft .Net framework that is troubling you, then update it by installing latest updates from Microsoft's website. If you are running an older version of .Net framework, then replace it with the latest one from Microsoft. You can also choose to repair the application on your own. However, it is little cumbersome and may require good expertise.
6. Defragment the disks and registry to clean up the unnecessary mess from the computer. Click on the Start button and then type ‘defrag’ (without quotes and as is) in the Start Search menu. Hit the Enter key on the keyboard to proceed. Select the drives that have exceeded the threshold limit and defragment them. (Run Defragmenter in Windows 7)
7. Use your registry cleaner that you downloaded and installed in the above steps to defragment the registry. You can also download defragmenting tools or other utilities to clean up the system junk. (See Also how to defragment disk in Windows 8)
8. Run a complete system scan from your antivirus program. Since malware or viruses among other infections can cause internal errors in your computer, running a scan will help detect and remove them. It is recommended to have a scan run regularly and as frequently as you can on your system. If you don’t have a security program installed, then download one from a trusted website. (You can Buy McAfee Antivirus here)9. If the problem persists, then uninstall and reinstall the troubling program or application like Visual Basic\Studio or .Net among others. Go to Microsoft’s website and download the particular program. Install it using the wizard’s commands and get going. (See Also how to uninstall a program completely from Windows 7)