yes for all
common
Your computer gets infected by opening unsafe emails, browsing to unsafe sites and downloading programs from unsafe sources.
Open Office files are 'open document format' - Microsoft programs should have no problem opening them.
To make a laptop accept your password when opening a Twitter account, simply click on the remember password option.
i want new account opening
You can find a variety of free registy fix programs right on the internet. You can do this by searching for one, opening the page, downloading the attachment, and opening the program. try "IOBIT advanced system care free", it fixes registry and other system cleanup tasks
Yes. Viruses and other harmful "malware" are often hidden in apparently innocuous programs. You should always be very careful about downloading any programs from websites which you might be unsure about, or of programs obtained by following links in emails. Always have up-to-date virus protection and other security measures and always run it.
Try deleting the app then re-downloading it.
Because your password is wrong
By using virus detection program or by not downloading or opening the attachment.
There is no simple answer to that as there can be all sorts of problems that prevent a document from opening or an application from opening.
it should, depending on the program. Anything Microsoft (running in macOSX) will show you on the opening screen - in the upper lefthand corner. Adobe programs will probably be in the "About program" in the file when you open it.