Right click on My Computer Icon on Desktop
>> Go to Properties
>> Go to Advanced
>> Go to Performance - Settings
>> Go to Advanced
>> Go to Virtual Memory - Change
Keep the initial size same as recommended and maximum size double of it then restart your system.
It will improve speed of windows and you can play some games which require higher RAM.
- Make a Folder in C drive rename it as "abc" without quotes.
- Now open Command Prompt from Start Menu.
- Type "attrib +s +h C:\abc" without quotes and press enter.
- This command will Make your folder invisble and it can not be seen even in hidden files and folders
- To make it visible again type "attrib -s -h C:\abc"
- You can lock any other folder also by changing the location C:\abc to address of your folder.