My pc shows CMOS error what is this?

[usaipad]

from some days my pc is showing CMOS error i want to know what is this. after this error my computer has been very slow and does not want any passward.
Before this error i was always type my password before log in.
please tell me in detail.

[smoggy]

it is possible to be a virus but more than likely your CMOS battery requires changing

[robbo1]

Is the time and date correct in BIOS? If not, the CMOS battery needs replacing

[trilog]

its a battey problem. change it

[xenyx]

change the internal battery.

[armourer]

Change the battery on the motherboard.

[haribo]

Change the battery on the motherboard.

oct 27th , i would imagine he sussed that by now.

from my android baby...