shutdown problem

[ruthwikns]

i am having a problem in my computer shuting down. when i shut down the computer it hangs on the logging off screen. i use windows vista.

[mrintech]

Clean your System Ram and Defrag your PC

[ruthwikns]

how do i clean my system ram

[Amir.php]

There are a lot of softwares available: such as CLEAN RAM 1.00
http://www.supershareware.com/info/clean-ram.html

Also thats may be cause of some necessary files may be missed out. Then you need to repair your system.