There are many ways to keep your computer safe and one of the effective method is by running high risk applications such as web browsers and email clients in an isolated space so that it is able to automatically sandbox malware preventing permanent changes.
Windows 7 comes with a free System Recovery disc that contains 5 valuable tools to help you fix common startup problems and etc. Although it seems to only allow you to create it on a CD or DVD, but we have found a method on how to install the Windows 7 System Recovery into USB.
Here we have 8 free tools that can auto extract multiple archive files, even if they are all protected by different passwords. You supply all the required passwords to the program and it will do the rest.