unknown device driver - Serial - Device Instance Id - ROOT/LEGACY_SERIAL/0000?
955896
First thing is this, if you aren't using that device you surely don't need a driver for it, so uninstall it.  Reboot your system, to see if new hardware is found.  If it is, it will ask you if you want to use an existing driver or a new one. Choose a new one, and insert your HP recovery CD.  Let it load from there.  Chance are it will not even see anything new.  Serial drivers are generally used for serial printers which are going obsolete anyway.  Hope this helps
974915
Go to the manufactures web site, down load the drivers....
897080
If u r sure go ahead by selecting "Continue Anyway" in general it will create a restore point when any driver are installed, if the problem is not solved restart in safe mode and try removing the Driver by going to Device Manager in System Property.\nSometimes there are common drivers for all, so This error message can occur, remember to make a restore point before proceed.
187335
Try download.com or drivers.com
1105912
Try www.driverguide.com \nUsername: all\nPW: drivers \nor vice versa.\n\nThey have a lot of drivers there.  Good Luck.
709778
You have something loading at startup that cant find its driver! open your device manager and see what it is and then download the driver for it or reinstall the software!
530238
Here : \n\nhttp://www.digistoresolutions.com/support_driver.htm
517023
Go to Start and click on help and support\nSystem information\nView the status of hardware and software\n\nThis should give you a list of all the applications and devices on your machine\n\nIf there are any conflicts, you will see the software causing the problem.\n\nLook under obsolete application and device drivers
466817
go to the device manager, it's either there "network adapter" or smth like that, or if you install the NIC (Network Interface Card) you will get the message "new hardware detected" and then follow the instructions on the screen to install the driver.
1133839
Go online and download the drivers
448199
Try looking for the driver on the web, there should be an option there when you are trying to install it.
856051
http://www.cdrinfo.com/Sections/Firmware/SingleModel.aspx?DriveId=984
802037
the manufacturers website or driverguide.com
786527
1st look on the cd or floppy if you have one.\n2nd try manufactures web site.\n3rd www.driversguide.com\n\nif you need to login then try this\n\nusername             drivers\npassword              all\n\nnot sure if this is still a current login you will have to give it a go.
585280
Just like the guy above said. Try to reinstall the each device and their drivers.. If they seem to not work, buy new stuff and install that.
352851
Customer Support\n(800) 252-5722\n\nYou can call that number and ask them to send you a copy of the installation CD.\n\nOtherwise you can find somebody that's selling it on an auction and ask them to send you the driver files.  Worked for me =)
763129
go to manufacturer's web site and download  the drivers there