OK, been using avast for some time, got the cleanup thing cause i was running slow, that really didnt help, and now after the cleanup thing this is happening, did clean up and avast start having babies or what?
- Which Avast…? (Free/Pro/IS/Premier)
- Which version…?
- OS…? (32/64 Bit…? - which SP/Build…?)
- Other security related software installed…?
- Which AV(s) did you use before Avast…?
What you are seeing is the avast process AvastUI.exe stopping and starting repeatedly. Avast UI.exe is responsible for the actual Avast Program Window to appear and run on your desktop when you click it, if it fails and starts repeatedly you will see this. What happens when you click the (AvastUI.exe) icon in system tray?
Please provide information Asyn requested.
ASYN: was gonna post all that but Avast UI wouldnt load, so had to reinstall it, so i dont know what version i was running but it was the free one. Been running avast since 2016 and only avast. windows 10 64bit
MCHAIN well, it disappears, poof like magic. I had to reinstall avast av, so now i shall see what happens. Ty 
An Avast Repair could have been your first option.
Presumably you used the Win10 Control Panel > Programs & Features to Uninstall Avast ?
If so there should have been a Repair option in that screen.