How to transfer MT4 to new computer with all data for testing?

Hi all

My computer was under virus attack so i am formatting everything and installing and upgrading windows operating system. I have demo account and i keep testing different logics and systems but now i have to format everything and create new partition on hard disk. I want to keep all forex historical data for testing purposes.

Which folder should i keep or copy paste in new computer when i setup again my demo account? otherwise i will loose all data.

you should have at least 2 hard drives, one for the main drive and one for backing up precious data
if its a laptop an external USB drive or similar

back up complete copy's of all MT4s once a wk for instances such as this, especially as it only takes a few minutes to back up the full MT4 folders at the weekend from c drive

if you don't have 2 drives, save to a memory stick
you could save your profiles / templates / indicators / experts and history file folders to a memory stick
then can wipe the drive with the virus
and then scan all the saved files on the memory stick for a virus before re-adding them back to the clean drive and clean MT4s

drop the saved MT4 folders from the memory stick into the new MT4 folders and you are back to where you were before the virus

Thanks. I already saved MT4 folder on memory stick but I didn't know that which folders should be copied in new installed MT4. I was also worried that if I copy those folders then it could corrupt the new installation files.

Thanks again.