My laptop runs very slow on Mains power, but runs fine and fast on battery???? (Acer Aspire 5535) This only started approx 2 months ago. Tried all the usual clean ups, registry ect, but didd not help. Is there a problem with my charger? or is the problem in my power circuitry on the motherboard.

Try removing the battery and running just on mains power. If that doesn't work, it sounds like the motherboard has failed and will need replacing.

The battery starts a slow decline over months and years, eventually you will notice the time between charges gets less and less until you are down to minutes, this quite normal for these batteries. The average life span is one to three years for most batteries before replacement is required.

If it was fast check that a Ram Chip has not died on you, if it's always been slow put more Ram in it.

Turn the computer off.
Disconnect the AC power.
Remove the battery.
Purchase a can of compressed-air, and give your computer a "blow-job", to remove the dust, because the dust is acting as a layer of insulation, trapping heat inside your computer.

Reload the battery.
Connect the AC power.
Start your laptop, and check that the fans inside the notebook computer are pushing air out of the exhaust-vents. If not, the fan(s) have failed, and you need a professional computer technician to disassemble your computer, and fix the fans.

Sorry. It seems that your battery is dead.
If your laptop is working fine on AC power only (with the battery disconnected), then your battery will need to be replaced.

Try replacing the battery, i think the battery is defective.

First make sure the fan is running and it's not shutting down from over heating.
If the fan is fine,(Links provided)
You need to run a virus scan with something like Spybot seach and destroy
Also run a registry cleaner like Regscrub xp
And a junk file cleaner such as CCleaner

If you still have the issue you need to Update your video card (The driver messes up after some windows updates for some reason)



Please rate this a fixya

This may be a battery power monitor issue. Try disabling the "Mircosoft ACPI- Compliant Control Method Battery" device. This is located in Control Panel-->System-->Hardware Tab-->Device Manager-->Batteries. Had similar problem with 2 Acer Aspire series laptops (diff models). 2 and 3 year old. Original batteries (both still hold charges for 1.5 hrs of normal usage). Running WinXP, one with SP2 and other had SP3. Both came in the last month with slow jerky TPAD function and nearly non responsive keyboard access. Checked the usual; virus, spyware, hijacking, driver conflict etc. Cloned drive and factory installed..still same problem with kb & mouse. However an external USB keyboard and mouse functioned normally (no lag). Noticed with Battery removed kb & mouse was normal. Finally found disabling ACPI control battery device resolved this issue while allowing laptop to run on either battery or AC.

I can only see first two lines of your message so might need more information ALL computer power off if the not used for sometime this can be 5 mins or 5 hrs depending what your power functions are set at If it is not plug into the wall plug in and leave for half an hour then try turning on and in control panel the is an icon called power change the setting to suit