I have a problem to run the Task Manager and regedit... ho to solve the problem

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What error messages do you get ?
What operating system ?
Is it FULLY patched ?
Have you scanned it for viruses and malware ?
Have you tried system restore ?
Anything else you can think of.

Hi This is a good solution but be careful OK, Namer just download unhookexec.inf you can Google it, it is there... download it to your desktop then right click your mouse and install. Then if Run Dialog Box exist type regedit and your there, if RUN dialog box doesn't exist then you can run it in MS DOS Prompt... Note: Some virus cause that and don't worry you are not alone I have here also hehehe