are u still getting alerts of infection from avast or noticing unsual bahaviour?though everything looks clean from mbam and ots log u can have your pc checked via this:
1.download kaspersky virus removal tool 2010 from here:http://devbuilds.kaspersky-labs.com/devbuilds/AVPTool/
2.save it to your dsktop.
3.open the tool by double clicking on it.
4.Go to the Autoscan tab.
Check the boxes for the areas to be scanned. By default Kaspersky Virus Removal Tool 2010 scans for viruses System memory, Disk boot sectors and Hidden startup objects. In the main window on the Autoscan tab you can define the scan area by checking the necessary scan areas.
Select the required actions to be performed on detected threats by clicking the link in the On threat detection line.
4.Click on the start scan button.
5.Wait until the process is complete.
http://support.kaspersky.com/images/home/avptool_2871_01_en.jpg
Once the scan task is started, the program will detect and automatically delete all known viruses, rootkits, Trojan programs and worms. The application will perform the following actions on threat detection:
6.Prompt when the scan is complete (if you selected Prompt on completion).
7.Prompt for action on each threat detection (if you select Prompt for action).
Disinfect or delete; or delete an infected object if disinfection fails (if you checked Select action: Disinfect and Delete/Delete if disinfection fails).
8.i suggest u right click on the prompt for action before the scan and select choose action menu and then click on delete if disinfection fails option.
http://support.kaspersky.com/images/home/avptool_2871_02_en.jpg
9.it may ask u to reboot if essential.
pls post logs on next comment if possible.also tell me whether this resolved the problem or not.