Most companies log all internet traffic that goes through the company server. As it passes through the server the username, password, computer used, time, websites visited, and email is logged. Removing it from your computer history does no good.
Also if they have a keylogger installed on your computer a hidden backup copy exists all your activity.
If you want to remove your browsing history from your computer, install CCleaner(free).
http://www.ccleaner.com/
Install options: Do not install toolbar or recycle bin options.
Ofter install: open CCleaner then open options
Under "Advanced" Uncheck "only delete files older than 48 hours"
Under "settings" check "Run CCleaner when computer starts.
Under "settings" check "Secure deletion" then select deletion method:
Simple Overwrite 1 Pass
DOD 5220.22-M 3 Pass
NSA 7 Pass
Run the following to find what deleted files are recoverable and erase them.
Restoration
http://www.pcworld.com/downloads/file/fid,23108-order,1-page,1-c,alldownloads/description.html
Recover deleted files--or delete them for good--with this small program.
You will may need to log on as an administrator.
If you do not have an administrator password
http://www.loginrecovery.com/
http://www.hsinlin.com/tips/lost_password.html
-------------------------------------------
Tracking software is often installed as a rootkit:
Rootkit Removal Guide
http://safecomputing.umn.edu/guides/scan_unhackme.html
AVG Anti-Rootkit
http://www.grisoft.com/doc/products-avg-anti-rootkit-update-app-art/?ver=1.1.0.29
F-Secure BlackLight
http://www.f-secure.com/blacklight/
RootkitRevealer
http://www.microsoft.com/technet/sysinternals/utilities/RootkitRevealer.mspx
Sophos Anti-Rootkit
http://www.sophos.com/products/free-tools/sophos-anti-rootkit.html
UnHackMe
http://www.greatis.com/unhackme/buy.htm
http://safecomputing.umn.edu/guides/scan_unhackme.html
Invisible Trojan's - Rootkits Killer
-----------------------------------------------------
These following programs may be able to find spyware on a computer.
Ad-Aware SE Personal (update + full scan)
http://www.lavasoftusa.com/products/ad-aware_se_personal.php
Spybot Search & Destroy (update + immunize + scan)
Do not enable Tea Timer and SDHelper
After installation: update + scan + immunize
http://www.safer-networking.org/en/mirrors/index.html
SpywareBlaster: Update then open and click “enable all protection”.
http://www.javacoolsoftware.com/spywareblaster.html
SUPERAntiSpyware free version: (update + scan)
http://www.superantispyware.com/