Hanging of laptop after every 4-6 second

[sunil30111988]

Hello,
my dell laptop 500 gb harddisk, 4 gb ram, i5, window 7. it is hanging up after every 4-6 sec. now, videos and pdf files are not opening directly as before. not even scaning happaning fast. firebox is showing 'not responding' again and agian. right now, process 88, cpu 25% are showing task bar.
note:extra information are given

 

[mouse24]

When was the last time you defragged and ran full virus and antimalware scans?

 

[Quaddro]

the easiest way to solve your problem is to reinstalling your operating system...

 

[Brett928S2]

Hi

VIRUS or FAILING HARD DRIVE...

All the best Brett