My Nokia N70 is not showing contacts from my Sim card. Please help!

You should copy all the contacts from your Sim to N70 phone.

1. Select Sim directory

Contacts > Options > SIM Contacts > SIM Directory.

2. Copy all your SIM contacts to the phone memory, 

Options > Mark/Unmark > Mark all, then Options > Copy to Contacts.

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