The er.sys is a CD / DVD reader manufactured by Acer. Problems such as drive is not found or is not recognized by Windows, or drive cannot read or write media can be solved when you update the driver. This driver - "cd_acer.sys" - has been downloaded 361 times and is rated 3 out of 5 stars based on 6 reviews. The total disk space used for this update is 11.2 KB.
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789 (DG Member) on 17-Jan-2001
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To get the cd_acer.sys driver, click the green download button above. After you complete your download, move on to Step 2.
If the driver listed is not the right version or operating system, search our driver archive for the correct version. Enter Acer cd_acer.sys into the search box above and then submit. In the results, choose the best match for your PC and operating system.
Tech Tip: If you are having trouble deciding which is the right driver, try the Acer Driver Update Utility. It is a software utility which automatically finds and downloads the right driver.
To find the newest driver, you may need to visit the Acer website. Most major device manufacturers update their drivers regularly.
To install your new driver on Windows:
Right-click the Start button.
Click "Device Manager">
Find your device in the list.
Right-click the device and select "Update driver"
Follow the steps on screen.
Restart your computer when done.
This keeps your computer working at its best.
Tech Tip: Driver downloads and updates come in a variety of file formats with different file extensions. For example, you may have downloaded an EXE, INF, ZIP, or SYS file. Each file type has a slighty different installation procedure to follow.
For more help, visit our Driver Support Page for step-by-step videos on how to install drivers for every file type.