Because of the new hard drive, you might to turn off the option to go into "Standby" or "Hibernate". Have you tried RIGHT clicking on the desktop, choose "properties", then click on the "ScreenSaver" tab. Acess the "Energy Saving" features area and set all options to "NEVER" so that the machine will always be "ON", or "OFF", but never in between. Click on "Apply", then OK. In addition, because there is more "stress" on the system because of the larger hard drive, you need to check to make sure that all the drivers you are installing are the most up-to-date versions by visiting the manufacturer's website.
I also find that immediately after installing the OS and the drivers, it's a good idea to run a Scandisk and Defrag to optimize the hard drive. It seems to work out the "kinks". Do the Scandisk first, then the Defrag. After opening Scandisk, place a CHECK mark in ?Automatically Fix Errors. Click on the "Advanced" button, then make sure the settings look like this:
Log File=Replace Log
Lost File Fragments=Free
Check Valid Files For=Place a check in ALL of the options
Check Host Drive First
Hope this helps.
Windows 98SE - Athlon 700Mhz - 256MB RAM
I just did a complete new install - changed out the hard drive to a Western 160GB - so I have almost nothing in the system yet, except drivers. It takes about 3 minutes or longer to boot up - even before I started installing the drivers. It seems to do OK till the Windows splash screen comes up, then that goes out and the screen shows all the devices loaded at what IRQ's and it sits there for about 2 minutes, like it is dead, and finally starts up with my desktop. But then, if I don't make any entries for a while, the screen goes black and I have to reboot. Before, all I had to do to bring it back to life was move the mouse or hit any key and it was back, right where I left it. Now, nothing I move or hit brings it back up. So if it is in something when it "went to sleep", I have to start all over. What do I do to keep it awake?