Dell OptiPlex 755 - Error Messages; A FILENAME CANNOT CONTAIN ANY O F THE FOLLOWING CHARACTERS; A REQUIRED.DLL FILE WAS NOT FOUND; drive letter:\ I S NOT ACCESSIBLE. TH E DEVICE I S NOT READY

Solving Problems 335
Windows Vista:
1 Click Start → All Programs → Modem Diagnostic Tool .
2 Follow the instructions on the screen to identify and resolve modem problems. Modem diagnostics are not available
on all computers.
VERIFY THAT THE MODEM IS COMMUNICATING WITH WINDOWS —
Windows XP:
1 Click Start → Control Panel → Printers and Other Hardware → Phone and Modem Options → Modems .
2 Click the COM port for your modem → Properties → Diagnostics → Query Modem to verify that the modem is
communicating with Windows.
If all commands receive responses, the modem is operating properly.
Windows Vista:
1 Click Start → Control Panel → Hardware and Sound → Phone and Modem Options → Modems .
2 Click the COM port for your modem → Properties → Diagnostics → Query Modem to verify that the modem is
communicating with Windows.
If all commands receive responses, the modem is operating properly.
E
NSURE THAT YOU ARE CONNECTED TO THE INTERNET — Ensure that you have subscribed to an Internet provider.
With the Outlook Express e-mail program open, click File. If Work Offline has a checkmark next to it, click the
checkmark to remove it and connect to the Internet. For help, contact your Internet service provider.
Error Messages
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product
Information Guide .
If the error message is not listed, see the documentation for the operating system or the program that
was running when the message appeared.
A FILENAME CANNOT CONTAIN ANY OF THE FOLLOWING CHARACTERS: \ / : * ? “ < > | — Do not use these
characters in filenames.
A
REQUIRED .DLL FILE WAS NOT FOUND — The program that you are trying to open is missing an essential file. To
remove and then reinstall the program:
Windows XP:
1 Click Start → Control Panel → Add or Remove Programs → Programs and Features .
2 Select the program you want to remove.
3 Click Uninstall .
4 See the program documentation for installation instructions.
Windows Vista:
1 Click Start → Control Panel → Programs → Programs and Features .
2 Select the program you want to remove.
3 Click Uninstall .
4 See the program documentation for installation instructions.
drive letter :\ IS NOT ACCESSIBLE. THE DEVICE IS NOT READY — The drive cannot read the disk. Insert a disk
into the drive and try again.