您是不是只有在 XP 正常,裝置管理員顯示為 PL-2303,而在 Vista 或 Win 7 /8 的作業系統上出現黃色驚嘆號, 而且這一條線可能在網拍購買價格約百元.

如果是 那您買到盜版晶片,原廠為了確保權益,在驅動程式上做了保護,請參考

Warning Notice:
Please be warned that counterfeit (fake) PL-2303HX (Chip Rev A) USB to Serial Controller ICs using Prolific's trademark logo, brandname, and device drivers, were being sold in the China market. Counterfeit IC products show exactly the same outside chip markings but generally are of poor quality and causes Windows driver compatibility issues (Yellow Mark Error Code 10). We issue this warning to all our customers and consumers to avoid confusion and false purchase. Prolific prohibits the distribution of any PL-2303 drivers (including download links) without written permission from Prolific.

Prolific advices end-users to only purchase vendor branded cable products with company name contact information for service and support. Prolific does not sell cables with Prolific brand and packaging. In case you suspect a counterfeit chip inside, you may also contact Prolific to provide the vendor information.

http://www.prolific.com.tw/US/supportDownload.aspx?FileType=56&FileID=133&pcid=85&Page=0

通常包裝比較精美,台商製造的 250 元以上的產品,應該都是真品,您也可以請購買的商店詢問是否保證可以在 Vista 或 Win 7 /8 的作業系統上使用.