Simple Cleaner, also a Windows security program. If you are worried about coworkers going to recover files, remember - simple deletion is not secure enough because anybody can recover your sensitive files.

Simple Cleaner lets you to delete files with simplicity and ease. You can choose a fast single pass, or the most secure NSA erasure algorithm.

File Wiper feature is a disk and file wipe utility that allows you to wipe sensitive files in handy manner.
Simple Cleaner also empties Windows Temporary folders, clears clipboard, Recycle Bin content and Recent documents history, and allows disable the Recently Used Documents from access without deleting the list of Recently Used Documents.

Simple Cleaner main features:
Clear Browser History
All information about web sites you visit is stored in the Browser History Files and anyone who has access to your computer can see what web sites you visited. Simple Cleaner allows you to clear Internet History in Internet Explorer "Clear browser history" feature also includes clearing address bar history (URL AutoComplete) and clearing AutoComplete forms "Clear browser history" option for Internet Explorer includes deleting index.dat file.

Delete Cache (Temporary Internet Files)
Browsers cache most of the pages you visit including pictures, animation, movies, etc. This speeds up the displaying of pages you frequently visit as a web browser can open them from your hard disk instead of downloading them from the web. By simply opening the cache file/folder (Temporary Internet Files), anyone can see what videos you've watched, what pictures you've seen, where you've been online and more. Using "Delete Temporary Internet files" option you can completely Clear Cache (delete Temporary Internet files). "Delete cache" option for Internet Explorer is combined with deleting index.dat file content.