Troj/Iefeat-I is an downloader for adware.
Each time Troj/Iefeat-I is run it tries to download adware DLLs and executables from a remote site and install/run them.
When first run Troj/Iefeat-I adds it's pathname to a new sub-key of the following registry entry to run itself on startup:
HKLM\Software\Microsoft\Windows\CurrentVersion\Run\
The new sub-key will have the same name as the Troj/Iefeat-I executable, for example:
HKLM\Software\Microsoft\Windows\CurrentVersion\Run\
f2install.exe = <path>\f2install.exe
Registry entries are also created under:
HKCR\CLSID\(24DA7F8B-73D3-2B13-CDBA-3E5AF577424E)