it's all going wrong

where do I start? sometimes get message svchost.exe has caused errors and will close. internet explorer won't work. can't go to page links, won't work. can't open e-mails- message RICHED32.DLL failed to load.please re-install, followed by message there was an error opening this message. there is not enough memory. can't get firewall to open or work. can't copy or paste any documents in ms office. is it pc out of the window time????

 

Run SFC's /scannow command.

What are the (full and complete) error messages?

 

thanks brett but can't follow your link. sorry for my total incompetence. also the search facility won't work and can't add or remove programmes.

 

The original message reads under the heading of Programme Error.
svchost.exe has generated errors and will be closed by windows.
you will need to restart the programme.
Is there a site address for SFC's scannow?
Thanks.

 

You appear to need up-to-date patches...

RPC and SVCHOST errors