I have Windows 7 on an HP PC. I could not open the "Change the keyboard layout" to fix an input language problem. The error given was: C:\Windows\system32\rundll32.exe. There is plenty of discussion online about rundll32.exe all boiling down to fixing the Registry. There is also plenty of software for doing just that. My understanding is that you don't think much of this kind of software.
RUNDLL32 is part of the Windows operating system that allows programs to run code in various DLL code libraries. It is not specific to any one program. Errors here can have many sources, obviously. It is also possibly a virus and malware may also be at play, so before proceeding, make sure your antivirus and malware programs are up to date and returning clean scans. Malwarebytes Antimalware is what I recommend for quick checks and can be downloaded directly fromtinyurl.com/2fwj868.
You are correct that I would never recommend any of those online "Registry fixers." Instead, try running the Windows 7 System File Checker as follows: Open an elevated command prompt by clicking Start, All Programs, Accessories, right-click Command Prompt, and then click Run as administrator. Type "sfc /scannow" without the quotes and then press Enter. Make sure you leave a space between sfc and /scannow. You can find more information including followup steps for the System File Checker at http://support.microsoft.com/kb/929833.
About a year ago I purchased a Seagate external drive for backing up my files due to the existing internal drive becoming full. I changed the backup location to Expansion Drive F and that is exactly what shows when it goes through the process to back up. However, every time I do a manual or automatic backup, I get a message: "A shadow copy could not be created. Insufficient storage available to copy storage file or other shadow copy date." And it says that the backup was unsuccessful. When I hit properties for the Seagate, it has plenty of space and I can actually do a manual download to the expansion drive to test that it is actually hooked up and working. How can I successfully use the automatic backup feature and get it downloaded to the expansion drive?
It may seem unrelated, but I've seen where manually creating a Restore Point solves this problem (Control Panel, System and Maintenance, System Protection). If that doesn't solve your problem, let's move on to a possible solution that's a little more complicated. The "shadow copy" portion of the error message may indicate that a specific portion of your C drive used by the Volume Shadow Copy Service to temporarily store a copy in an "in use" file may be too small. Open a Command prompt as Administrator (Accessories, right-click Command Prompt, Run as Administrator). Execute the command: vssadmin list shadowstorage. Look for the Maximum Shadow Copy Storage space size. This size may need to be bigger to accommodate your backup. The command to increase the size is: vssadmin Resize ShadowStorage /For=C: /On=C: /Maxsize=XXGB. Replace the XX with a number bigger than the current Maximum Shadow Copy Storage space.
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