what is the virus that disable the task manager and folder options and how to solve these problems?

Answer 1

maybe not the same problem ... but i had a similar issue turned out to be spyware problem fixed it with spybot free software ---- make a donation to them if you like it....
www.download.com/3000-8022-10289035.html

Answer 2

you may be able to get around it by going to the start menu and select "run" and type taskmgr.

There are several virii that have this behaviour - and some network configurations also have task manager disabled. If it's a corporate and school network , that's likely the case.