If you want a peace of mind, do the followings......
1. Run a full virus scan with the security program you have to make sure your machine is clean.
I recommend using Malwarebytes ( free edition ) to scan your system. Malwarebytes is one of the best in the business.
http://www.malwarebytes.org/products/malwarebytes_free/
2. Run a system file check to look for corrupt files. If any found, it will try to do repair.
Start button > in the search box, type cmd > to left, RIGHT click at cmd.exe > select Run As Administrator > Enter
at the flashing prompt, copy and paste this command line......
sfc /scannow
press Enter > wait, it will take a while.
When it is done, it will give you one of the following reports.....( paraphrasing )
1. No integrity violation is found.
2. Found corrupt files and repair is successful.
3. Found corrupt files but unable to repair.