How to mend Lexmark Z645

every time i downloade my phone says downloaded jat are invalid?

how can i get a copy of installation software for my lexmark z645 printer?

how to get to the f8 safe mode as my system will not work?

laptop not workin..Any idea's what could be wrong & if it can b fixed?

Cut and paste not working?

how to fix my acer laptop 5630?

how to fix Windows 10?

Excel issues Help?

Why has my fruit machine stopped working?

problem in sony vaio 16 gb pendrive?

windows vista or 7 cd wanted?

How can i fix my task manger?

The printer spooler is not starting automatically?

ep?

unable to open folder?

I have a havit pc camera but i have lost its driver cd ?

How can I make my computer suspend properly?

My window media player has a problem of not playing the video up to its end?

how can i recover my pan drive sandisk 4gb 2009?

when i open my computer it takes long time what can i do?

where is the fuse for a mk3 mondeo windscreen washer?

seagate external hard drive wont work 500gb?

RPC Server unavailable error when attempting to print or download software?

How can I mount different folders per user with Ubuntu?

Windows Xp... The end?

message remove?

sat nav in hondacrv?

Excel?

Windows 8 product key?

Task Manger?