Exhibit31.1

Certification of Chief Executive Officer Pursuant toRule 13a-14(a) under the Securities Exchange Act of 1934

I, John Bush, certify that:

1.    I have reviewed thisannual report on Form 10-KSB of PerfectData Corporation;

2.    Based on my knowledge, this report does not containany untrue statement of a material fact or omit to state a materialfact necessary to make the statements made, in light of thecircumstances under which such statements were made, not misleadingwith respect to the period covered by this report;

3.    Based on my knowledge, the financial statements, andother financial information included in this report, fairly present inall material respects the financial condition, results of operationsand cash flows of the small business issuer as of, and for, the periodspresented in this annual report;

4.    The smallbusiness issuer's other certifying officer(s) and I areresponsible for establishing and maintaining disclosure controls andprocedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e))for the small business issuer andhave:

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| a)  | Designed such disclosurecontrols and procedures, or caused such disclosure controls andprocedures to be designed under our supervision, to ensure thatmaterial information relating to the small business issuer, includingits consolidated subsidiaries, is made known to us by others withinthose entities, particularly during the period in which this report isbeing prepared; |

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| b)  | Evaluated theeffectiveness of the small business issuer's disclosure controlsand procedures and presented in this report our conclusions about theeffectiveness of the disclosure controls and procedures, as of the endof the period covered by this report based on such evaluation;and |

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| c)  | Disclosed in this report anychange in the small business issuer's internal control overfinancial reporting that occurred during the small businessissuer's most recent fiscal quarter (the small businessissuer's fourth fiscal quarter in the case of an annual report)that has materially affected, or is reasonably likely to materiallyaffect, the small business issuer's internal control overfinancial reporting; and |

5.    The small businessissuer's other certifying officer(s) and I have disclosed, basedon our most recent evaluation of internal control over financialreporting, to the small business issuer's auditors and the auditcommittee of small business issuer's board of directors (orpersons performing the equivalent functions):

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| a)  | All significant deficiencies andmaterial weaknesses in the design or operation of internal control overfinancial reporting which are reasonably likely to adversely affect thesmall business issuer's ability to record, process, summarize andreport financial information;and |

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| b)  | Any fraud, whether or notmaterial, that involves management or other employees who have asignificant role in the small business issuer's internal controlover financial reporting. |

Date: May 24, 2005

/s/John Bush

|  | John BushPresident and Chief ExecutiveOfficer |
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