Error message at start up

Nearly three months ago, I was infected by the worm sohaned.bp.
I removed it with Avira anti virus but eevery time at start up there is an error message popping up saying "Windows cannot find 'Chrome.exe' Make sure you typed the name correctly and try again.To search for a file, click the start button,and then click search"

At that time I didn't have Google Chrome Installed.
Moreover does this have anything to do with Brico Packs?? (Vista Themes for Windows) . I have uninstalled it ages ago but still it is the theme for my startup scren. Do they both have a relation??

My system has become very slow. I haven't formatted it from the time I purchased it a year ago (with the fear of losing the application.

Its not unusual to receive such an error after using specialized fix tools.

A "Cannot find...", "Could not run...", "Error loading... or "specific module could not be found" message is usually related to malware that was set to run at startup but has been deleted. Windows is trying to load this file but cannot locate it since the file was mostly likely removed during an anti-virus or anti-malware scan. However, an associated orphaned registry entry remains and is telling Windows to load the file when you boot up. Since the file no longer exists, Windows will display an error message. You need to remove this registry entry so Windows stops searching for the file when it loads.

To resolve this, download Autoruns, search for the related entry and then delete it.

Create a new folder on your hard drive called AutoRuns (C:\AutoRuns) and extract (unzip) the file there. (click here if you're not sure how to do this.)
Open the folder and double-click on autoruns.exe to launch it.
Please be patient as it scans and populates the entries.
When done scanning, it will say Ready at the bottom.
Scroll through the list and look for a startup entry related to the file(s) in the error message.
Right-click on the entry and choose delete.
Reboot your computer and see if the startup error returns.