(A Live CD allows you to boot into Linux, in this case Peppermint, without having to install it on the PC. Take out the CD and reboot and you have Windows back. Easy as pie, and it is usually not risky either.)
1. Recover a lost Windows password
Search for chntpw and install it.
2. Virus scan a Windows PC
Your friend / relative has a PC that has been crippled by viruses and you can't fix it from within Windows. Boot from your Live CD, then connect to the Internet. Now you need to decide which anti virus to use.
The best known free anti virus on Linux. Open a Terminal Window and type:
- sudo apt-get install clamav clamav-daemon clamav-freshclam clamtk
- press <ENTER>
- follow the prompts
To run, click Menu, run then type clamtk then press <ENTER>
Go here and download the .deb version, follow the guidelines on the website.
It looks like Avast! used to have a Linux version, but I can't find it now.
Go to this page, then click on ACG Anti Virus Free for Linux, click on the .deb version. You should be able to install it by double clicking the downloaded file.
3. Test hardware
CPU Burn-in, for RAM issues try MemTest86+ (there is usually an option to boot into this when booting from the Live CD) and gsmartcontrol (install it in Software Manager) can check the health of your hard drives. Peppermint comes with a tool called Disks (click Menu, Preferences, Disks) which also has SMART data and Tests that you can run.
Did I miss something? Mention it in the comments please.