It doesn't - unless you've set a schedule. The 'default' is Wednesday mornings at 1am - which is pointless because the computer cannot defrag the drive while it's switched off ! You would normally set the defrag program to run at a specific time and day which suits your needs. You can set it to run daily, weekly or monthly at whatever time is suitable to you.
Monthly
You should defragment your drive at least once a month to keep it running smooth and clear out unneeded items.
A Windows virus scan is not performed automatically if one does not configure it to scan a Windows computer automatically. An antivirus is protecting you automatically from opening a infected file.
Yes, they are often launched automatically when Windows detects a problem.
As frequently as Windows does on a PC.
Windows explorer automatically updates whenever Windows has a critical update. Computers should have Windows update activated to ensure a smooth update experience.
When a system restore point is created. Actually the Windows Registry is backed up daily if System Protection is turned on.
It shouldn't be necessary to defragment more than once a month, unless you are adding a lot more files, etc. to your computer. If you notice it begin to go more slowly, that is sometimes an indication you may need to defragment more often.
A computer makes system restore points quite often. It ranges from when you install/uninstall programs, to just logging onto Windows.
Often in order to be able to hear their surroundings.
No it's not. It keeps perfomance of your system on a very good level. But if you don't copy, move delete big amount files you don't need to defragment your hard drives more then 1 time per month.
LIST OF OPTIONS:Try defragmenting your hard drive. Open My Computer, Right click C Drive (often called "Local Disk"), open Properties, open the Tools tab and click Defragment. Start the defragmentatin process and wait for the defragmentor to finish.Using programs like "1 Click Fixer" Also works fixing registry problems and speed some computers up.Running "cleanmgr" by pressing the windows key then r.Removing old programs that clog up the system.