Press CTRL+ALT+DEL and go to the processes tab

Look for svchost.exe under the image name. There will be many but look for the ones which have your username under the username

Press DEL to kill these files. It will give you a warning, Press Yes
Repeat for more svchost.exe files with your username and repeat. Do not kill svchost.exe with system, local service or network service!

Now open My Computer

In the address bar, type C:heap41a and press enter. It is a hidden folder, and is not visible by default.

Delete all the files here

Now go to Start --> Run and type Regedit

Go to the menu Edit --> Find
Type "heap41a" here and press enter. You will get something like this "[winlogon] C:heap41asvchost.exe C:heap(some number)std.txt"

Select that and Press DEL. It will ask "Are you sure you want to delete this value?", click Yes

Now close the registry editor.