Avira System Speedup
is a separate suite of optimizing tools available as a separate trial download and part of Avira's more comprehensive Internet Security suite.
The free version does not include suite of optimization tools unless you upgrade when renewing...then you need to purchase after the trial period expires.Bleeping Computer DOES NOT recommend the use of registry cleaners/optimizers for several reasons.
Please read: Why you should not use Registry Cleaners and Optimization Tools
There are free alternatives which can be used to remove junk files such as CCleaner
To remove common trial and promotional software, Toolbars and junk programs often installed on a new computer by OEMs, use PC De-crapifier
which provides a wizard style interface with step by step instructions.
For other programs you don't recognize or know whether they are worthwhile to keep or be removed, use Should I Remove It?