Your note book is virus affected.
Try to system restore in earlier date. Follow the step
How will you confirm?
Follow the steep. Press win key +R >type gpedit .msc and soon an windows will open.
Press win key +R>ms config and soon an windows will open.
Press win key + R REGEDIT an windows will open soon.
Go to tools option >folder option >view>check on show hidden file
Check off hide protected operating system file
Check off hide extension known type file.
BUT still there are no hidden file in drive C:
Think your computer has affected by serious virus.
>start>program>accessories>system tools >system restore >set earlier date. If you have the strong virus you can not do that, then you should better to copy your data if necessary
follow step>set your hard disk in another computer .before install be ensure that .another pc is well condition.
>show hidden folder can see all system file >can open task manager>run type ms config >enter, it will be open windows>run type gpedit.msc> enter, it will be show.>run type regedit enter ,it will be open .think your another pc run in ok condition. Then type gpedit.msc and hit >administrative templates>system>turn off auto play>select enable>click down arrow >select all drives.
SET IT FROM BOOTH SIDE BECAUSE THERE ARE TWO SIDES >Go tools> 1 folder options>views>check on show hidden files and folders>2 check off hide extension >3 check off hide protected.
Now auto run program off. you can see and delete easily all the hidden unnecessary file .auto run file. Placed virus affected hard disk in this pc.explore drive select autorun/recycler/system volume information by dragging and delete it. Don't do the system drive for ensure r click on my computer >manage>disk management>identify system drive >and system drive letter>
Now You can copy your file and store in another drive which formatted emediate.And you can format drive one after one and transfer all the file to the formatted drive .Switch off the pc and put your pc again and install your os and set the pc same way Then type gpedit.msc and hit >administrative templates>system>turn off auto play>select enable>click down arrow >select all drives.
If you did not have the cd rom , you should create a bootable flash. follow the link.http://articles.techrepublic.com.com/5100-22_11-5928902.html
If you want remove manually 1st
If you want remove manually Autorun virus
2nd click here
You want to save your data download http://www.hiren.info/bootcd-on-usb-disk
Write cd with the ISO and restart pc cd will start soon,
for BIOS SETUP and go mini windows and deletesystem volume information and RECYCLER
from all drive except "C"
drive. Because Heart Of Castle.If can not remove download bootable f cecure,click here or http://www.techmixer.com/free-f-secure-rescue-bootable-cd-to-clean-virus-and-malware/
And write the ISO and boot from CD at the start time.
SET THE BIOS SETUP
for BOOT FROM CD http://www.windowsreinstall.com/articles/bios/
DONT USE KAV because it will delete your windows file
Now you will install and just delete C drive and create C drive same andinstall.
Installation guide click here.http://www.microsoft.com/windowsxp/using/setup/winxp/default.mspx