The freeware, little utility PureRa lets you safely delete these files and save some disk space.
Besides, by deleting iconcache.db, you can restore corrupted, garbled or fuzzy icons.
And also, by deleting .sqm-files (files created by MSN Messenger/Windows Live Messenger) you can ensure your privacy. There are rumors that sqm files can send about your use of MSN Live Messenger (read surfing behavior) to Microsoft.
PureRa is a portable utility and works well on Windows 7, Vista and XP. It is very simple to use, just select any file that you want to remove or select all and click ‘Clean’ button. The program can be downloaded free at source [via – Techtrickz]