what can i do?
It is sooooo slow…
Hello and welcome to the Forum! 
Please post some further informations:
- Which OS? (32/64 Bit - which SP)
- Which avast-version? (Free, Pro, Internet Security, Premier)
- Which program version (2014.9.0.2021 is the latest)?
- Other security related software installed?
- Which AV program was installed before? And how was it uninstalled?
DJBone