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a clean wipe of the partition and reset can be accomplished in the Bios functions, simply go into set up at boot and move through the menus until you achieve your goal. HP is well known for installing ghost partitions on their hard drives .
Your computer's clock is used to record the time whenever you create or modify files on your computer. You can change the clock's time and time zone.
Open Date and Time by clicking the Start button, clicking Control Panel, clicking Clock, Language, and Region, and then clicking Date and Time.
Click the Date and Timetab, and then click Change date and time. If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
In the Date and Time Settings dialog box, do one or more of the following:
To change the hour, double-click the hour, and then click the arrows to increase or decrease the value.
To change the minutes, double-click the minutes, and then click the arrows to increase or decrease the value.
To change the seconds, double-click the seconds, and then click the arrows to increase or decrease the value.
When you have finished changing the time settings, click OK.
To change the time zone, click Change time zone.
In the Time Zone Settings dialog box, click your current time zone in the list, and then click OK.
If your time zone observes daylight saving time and you want your computer's clock to be adjusted automatically when daylight saving time changes, make sure the Automatically adjust clock for Daylight Saving Timecheck box is selected.
When you boot up and the Date & Time is wrong then you correct the
Date & Time, then when you shut down and boot up again the Date and
Time has changed. This is an indication that the BIOS battery is flat
and you need to replace the BIOS battery. Install a new BIOS battery, go
into the BIOS setting and set the Date & Time etc. and the new
battery will keep your settings stored in the BIOS.
A BIOS checksum error is usually related to a near flat BIOS battery.
Replace the BIOS battery then boot up the laptop and go into the BIOS configuration and set the Date and Time settings etc. and the checksum error will disappear.
if you are wanting to connect ur laptop to an external display then you have to go the control panel, then display properties and change the resolution since ur laptop screen's resolution and external display's resolution might be different. most of the computers with vista automatically adjust that but in xp, u might have to do it yourself.