1. Single Click Screen Lock
You can lock your computer using the Win+L keyboard shortcut. Here’s another way to do it with a single mouse click. Right-click on your desktop, select New, Shortcut. In Type the location of the item, enter rundll32.exe user32.dll,LockWorkStation. Click Next, name the shortcut “˜Quick Lock’, and Finish
2.Customize Sticky Notes
You can format your Sticky Notes, by selecting text and using different keyboard shortcuts as shown in this screen capture:
3.Shortcut to Run Program as Administrator
You can Ctrl+Shift+Click on a taskbar icon to run the application as an Administrator with full rights (provided your account has permissions). Simply Shift+Right-Click on any program shortcut to run it as a different user, if for example you need higher privileges when logged in with your child’s account.
4.Boost performance with ReadyBoost
ReadyBoost improves your system performance by using faster USB Flash Drives instead of slower hard disks for system operations. It works best using flash drives with at least 1 GB of storage. Simply insert your flash drive, and if it meets certain performance benchmarks, Windows 7 will ask you if you want to use it for ReadyBoost and recommend the size to reserve.
ENABLE VIRTUAL WIFI ROUTER IN UR WINDOWS LAPTOP or PC
Windows 7 includes a little-known new feature called Virtual Wi-Fi, which effectively turns your PC or laptop into a software-based router. Any other Wi-Fi-enabled devices within range - a desktop, laptop, an iPod perhaps - will "see" you as a new network and, once logged on, immediately be able to share your internet connection.
This will only work if your wireless adapter driver supports it, though, and not all do. Check with your adapter manufacturer and make sure you've installed the very latest drivers to give you the best chance.
Once you have driver support then the easiest approach is to get a network tool that can set up virtual Wi-Fi for you. Virtual Router (below) is free, easy to use and should have you sharing your internet connection very quickly.
If you don't mind working with the command line, though, maybe setting up some batch files or scripts, then it's not that difficult to set this up manually. See Turn your Windows 7 laptop into a wireless hotspot for more