It looks like Avast stopped the main download but missed this one little bit
This should stop the alerts
CAUTION : This fix is only valid for this specific machine, using it on another may break your computer
Open notepad and copy/paste the text in the quotebox below into it:
CMD: bitsadmin /reset /allusers
CMD: DEL %TEMP%\*.* /F /S /Q
CMD: RD /S /Q %TEMP%
REBOOT:
Save this as fixlist.txt, in the same location as FRST.exe
Run FRST and press Fix
On completion a log will be generated please post that