error loading c windows system32 nvmctray dll

Help. Dll errors appearing after startup.

immediately after booting the computer I get these errors. Error loading C: \ windows \ System32 \ NvMcTray.dll Access Denied Error loading C: \ windows \ system32 \ nvcpl.dll Access denied what these errors mean? I scanned my computer for virus Comodo security. The only thing I noticed is that when attempts to change the Display Properties menu does not open. (I'm on Windows Vista) Any help would be appreciated thanks

These two collections of programs for the driver of the Nvidia video card. It could very well have something to do with changing the display properties. Leaving aside for the moment the possible causes of change in access, you can try to correct this situation. These instructions are for Windows Vista. You can also use for Windows XP, but first you must start in Safe Mode as an administrator to access the Security tab. 1. In Windows Explorer, go to C: \ Windows \ System32. 2. Click NvMcTray.dll click and select Properties. 3. Click the Security tab. 4. On my Vista machine, my management group has Allow for the following permissions: Full Control Modify, Read and execution, read and write. The users group should have only Read & Execute and Read. 5. If your different machine, click the Edit button and said so. Repeat for other file nvcpl.dll. Hope that helps.