I am using XP and can't connect with Wi-Fi. My friend say WZC is missing. Any solution?

1. Start->Run
2. Type regedit
3. Click HKEY_LOCAL_MACHINE
4. Click SYSTEM
5. Click CurrentControlSet
6. Click Services
7. Click WZCSVC
8. Add a DWORD entry named "Start"
9. Change value as "2"

Face Book : How to stop video postings by others in my page?

1. Acctounts -> Application Settings ->
2. Select Allowed to Post from Show list box
3. Click Edit settings of Video (To open Edit Video Settings window)
4. Click Additional settings -> Uncheck publish content to my wall

How to see the Hidden files of a folder?

Open the folder.
Tool -> Folder Options -> View ->
(In advanced settigns box) Hidden files and folders ->
select  show hidden files and folders -> OK
 

If you are using windows 7

Open the folder 
Click the Organize menu entry and then click the  Folder and search options
View -> Show hidden files, folders and drives

In facebook, how to hide 'Recent Activity' from others?

It's so simple!

Application settings -> Ads and Pages -> Edit Settings -> Additional Permissions.

Uncheck the box next to “Publish recent activity”

Note: You can find Ads and Pages under Notifications Tab