Security vendor Comodo offering Comodo System Utilities in Free and Pro editions. This suit of tools with Privacy cleaner, Registry Cleaner and Disk Cleaner removes unnecessary registry entries, deletes temp files to free up disk space and improves system performance, your privacy is protected by cleaning traces from browsers such as cookies, browser history, and saved passwords. Comodo System Utilities (CSU) automatically backs up files before cleaning so that you can always restore deleted files or registry entries without any problems what so ever.
Download and install the program on your computer, this program with colorful and intuitive interface lets you access and navigate shortcuts offered on left side. Allow CSU to scan your computer which quickly shows number of issues it found, don’t clean all issues blindly instead, views the issues shown on dashboard for registry cleaner, privacy cleaner and Disk Cleaning tools.
You can create custom profile by selecting and unchecking some issues so that you can always use that profile to clean selected issues by you whenever you run these tools.
if any file resists to delete you can schedule that file to delete automatically on restart of your Computer with Force delete function.
Shredder allows you to permanently remove files and from your computer.
Autorun Manager lists startup programs on Startup tab and you can view tabs: Drivers, Services, Boot Execute Schedule Task . One important aspect here is all these tabs shows whether any of these items are signed or unsigned and infected or not infected. You can also disable unnecessary items on startup to improve boot time of windows.
For Registry, Privacy and Disk Cleaners offers restore tab which lets you restore already backup files or registry keys before cleaning.
I recommend you also to create restore point before cleaning your computer with CSU if anything goes wrong you can use that restore point to reach previous state.
Comodo System Utilities works on Windows XP/Vista/7, download it from here.