That worked 
Avast should install now
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:
CreateRestorePoint:
ShellIconOverlayIdentifiers: [00avast] -> {472083B0-C522-11CF-8763-00608CC02F24} => No File
HKLM\SOFTWARE\Policies\Microsoft\Internet Explorer: Policy restriction <======= ATTENTION
HKU\S-1-5-21-443951736-1583617210-2315430799-1001\SOFTWARE\Policies\Microsoft\Internet Explorer: Policy restriction <======= ATTENTION
FF Extension: No Name - C:\Users\Little Wonders\AppData\Roaming\Mozilla\Firefox\Profiles\fanljv6v.default\extensions\_qvxbkbnnuzqukzjj_i@frnhpojlbr_in.com [not found]
FF Extension: No Name - C:\Program Files (x86)\Mozilla Firefox\browser\extensions\{972ce4c6-7e08-4474-a285-3208198ce6fd} [not found]
S3 catchme; \??\C:\ComboFix\catchme.sys [X]
2015-08-14 10:45 - 2015-08-17 11:48 - 00000246 _____ C:\Users\Little Wonders\Desktop\IFEO.reg
2015-08-13 13:58 - 2015-08-17 11:34 - 00000000 ____D C:\Qoobox
RemoveProxy:
EmptyTemp:
CMD: bitsadmin /reset /allusers
Save this as fixlist.txt, in the same location as FRST.exe
https://dl.dropboxusercontent.com/u/73555776/FRSTfix.JPG
Run FRST and press Fix
On completion a log will be generated please post that