Excel (Office 2007) was playing up this morning. Working OK with data but very slow to save. I ran full scan with MSE which detected 3 potential threats. Clicked Clean PC which it did until it got just over halfway & stopped. Managed to close it thinking I could get back to it & do the clean or re run the scan but now it wont open. Any ideas welcome

Download free Malwarebytes

 

https://www.malwarebytes.com/mwb-download/

 

and free Super

 

https://www.superantispyware.com/professional-x-edition.html

or AdwCleaner

https://www.malwarebytes.com/adwcleaner/

 

and run them, quarantine any bad stuff, reboot.

 

Prepare to be urged to install an SSD if you don't have one and reinstall everything. Yes, that will make your three PUPs go away. ????

Check the health of your hard drive.

 

https://www.ccleaner.com/speccy can do that for you.